US5343155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fault detection and location system for power transmission and distribution lines
Assignee: Montana State University – Bozeman
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Filing: 1991-12-20
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Granted: 1994-08-30
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Expires: 2011-12-20
Abstract
Abstract A system for detecting and locating faults on a power system includes the e of fault detection and transmitting devices on each pole of the system. The fault detection apparatus includes detecting coils mounted on the static line on either side of each pole, and a third detecting coil positioned so as to detect an orthogonal magnetic flux due to a phase-to-phase fault. A microprocessor on each pole analyzes the type of fault from the output of the three coils, and transmits the identification of the pole and pertinent fault data, when appropriate, to a repeater system. Thus, fault information from an entire power system can be fed through the repeater system into a central location.
Inventors
- 👤 Murari L. Kejariwal
- 👤 Baldev Thapar
- 👤 Victor Gerez
- 👤 Daniel March
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:34
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/26; H02H7/261; H02H1/00; H02H1/0007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A system for detecting and locating faults on a power transmission/distribution system having line supports carrying power lines and a ground line, comprising: sensing means on said ground line at each said line support in said power transmission/distribution system arranged on each side of each said line support for determining a direction of ground current flow on said ground line; fault detection means on each said line support in said transmission/distribution system for detecting an orthogonal current component at each respective line support due to a line to line fault; transmission means on each said line support in said transmission/distribution system for sending an identification number of a line support at which a fault is detected; and a plurality of repeater means arranged throughout said power transmission/distribution system for receiving and sending to a central location identification numbers of the supports at which faults are detected.
Claim 2
Independent Claim
146 words
A system for detecting and locating faults on a power transmission/distribution system having line supports carrying power lines and a ground line, comprising: sensing means on said ground line at each said line support in said power transmission/distribution system arranged on each side of each said line support for determining a direction of ground current flow on said ground line; fault detection means on each said line support in said transmission/distribution system for detecting an orthogonal current component at each respective line support due to a line to line fault; transmission means on each said line support in said transmission/distribution system for sending an identification number of a line support at which a fault is detected; and a plurality of repeater means arranged throughout said power transmission/distribution system for receiving and sending to a central location identification numbers of the supports at which faults are detected.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-29 | 1998-02-28 | 1998-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-29 | 2002-02-28 | 2002-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-29 | 2006-02-28 | 2006-08-30 | $7700.00 | Window Closed / Lapsed |